Fluorimetric determination of butylated hydroxy anisole in food products and packaging material

Hurtubise, Robert J.; Latz, Howard W.

doi:10.1021/jf60169a008

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…For lifetimes shorter than 2 ns, the convolution of the fluorescence with the exciting light profile is too severe to allow a simple log plotstraight line fit. In this case, the lifetimes were determined by use of a series of synthetic fluorescence convolutes (9). The response of the detector to scattered laser radiation and to the fluorescence emission is shown for two examples in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Squirrel-cage photomultiplier base design for measurement of nanosecond fluorescence decays

Harris¹,

Lytle²,

McCain³

1976

Anal. Chem.

122

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Pommersheim and Chandra (1975) present analytical solutions for the general problem of the optimal policy of batch reactor operation (and tubular reactor operation when catalyst with no slip moves with the reaction fluid) for catalyst decay rates which depend on temperature, activity and concentration.The optimal temperature and corresponding concentration and activity formulas which they present are valid whenever the Legendre-Clebsch (L-C) condition is obeyed. They list three other criteria which they claim are equiualent to the criterion employed by Szepe and Levenspiel (1968) for the case of concentration independent decay. This is criterion (i) ofTable 1, which requires minimizing the final concentration (CAf), or maximizing the final conversion, for fixed run times (t,) and desired final activities (uf).The entire problem is shown in Table 1 with all four criteria stated. Solutions for the optimal policy can be shown to be identical for all four criteria. But for the optimal policy equations to be valid, the appropriate L-C conditions must be shown not to be violated. The L-C conditions may be different for these criteria, as they are derived employing the transversality conditions. The purpose of this note is to elucidate these restrictions on optimal temperature policies for the problem discussed by Pommersheim and Chandra and by example to further define the ranges of applicability of their solution. NTH ORDER SINGLE IRREVERSIBLE REACTIONThe reaction and activity rate functions considered are rA = KA am CAn respectively, can be shown to the independent of the nature of the criteria which specifies the Legendre-Clebsch condition. In order that Equation (2)-(4) specify optimal profiles, the L-C Functions* C.4 (t), 4 t h Y(t)Constraints 6 = C.4 + r.4 (C.!, a, Y) = 0 6 2 = a' + 6 (C,, a, y) = 0 End Conditions and Objectitje FunctionsCriterion (i) Criterion (ii) Criterion (iii) Criterion (iv)

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Squirrel-cage photomultiplier base design for measurement of nanosecond fluorescence decays

Harris¹,

Lytle²,

McCain³

1976

Anal. Chem.

122

View full text Add to dashboard Cite

show abstract

“…Measuring medicinal compounds is one of the most important studies in this field and can provide a lot of information during patient treatment or its role in environmental pollution [4,5]. In between of analytical methods in sensing of pharmaceutical compounds [6][7][8][9][10], electrochemical methods showed more attentions due to many advantage such as easy modification for sensitive sensing, low cost and wide range applications [11].…”

Section: Introductionmentioning

confidence: 99%

ZnO/1-hexyl-3-methylimidazolium chloride paste electrode, highly sensitive lorazepam sensor

Chenarani

Ebrahimi

Arabali

et al. 2023

J. Electrochem. Sci. Eng.

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The measurement of pharmaceutical compounds in biological fluids is considered an effective way to evaluate their effectiveness. On the other hand, lorazepam is a drug with good efficiency in treatment and some side effects, which measurement is very important. In this study, the ZnO nanoparticle was synthesized as an electrocatalyst by chemical precipitation method. In continuous a simple modification on paste electrode (PE) by ZnO nanoparticle (ZnO-NPs) and 1-hexyl-3-methylimidazolium chloride (HMImCl) was made and new sensor was used for sensing of lorazepam. The HMImCl/ZnO-NPs/PE showed catalytic behavior on oxidation signal of lorazepam and improved its signal about 2.17 times compared to unmodified PE. On the other hand, oxidation signal of lorazepam was reduced about 110 mV at surface of HMImCl/ZnO-NPs/PE compare to unmodified PE that confirm accelerating the electron exchange process after modification of sensor by HMImCl and ZnO-NPs as powerful catalysts. The HMImCl/ZnO-NPs/PE was used for monitoring of lorazepam in water and injection samples and results showed recovery data 98.5 to 103.5 % that are acceptable for a new sensor.

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“…Research studies confirm that high doses of BHA in food products can be hazardous for the human body and the monitoring of its concentration is important in food products. Therefore, some analytical methods such as electrochemical sensors [16], fluorimetry [17], gas-liquid chromatography [18], capillary electrophoresis [19], and high performance liquid chromatograpy (HPLC) [20] were suggested for the electrochemical determination of BHA concentrations.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of Butylated Hydroxyanisole in Food and Wastewater Samples Using Electroanalytical Two-Fold Amplified Sensor

et al. 2022

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A high performance and fast response sensor was fabricated as a monitoring system for the determination of butylated hydroxyanisole (BHA) in food and wastewater samples. In this regard, a carbon paste electrode (CPE) that was amplified with platinum-decorated single wall carbon nanotubes (Pt/SWCNTs) and 1-Butyl-3-methylimidazolium chloride ([C4mim][Cl]) was investigated as a new electroanalytical sensor for the monitoring of BHA in aqueous solution. The [C4mim][Cl]/Pt/SWCNTs/CPE offered an excellent catalytic activity on oxidation signal of BHA and enhanced its oxidation current about 5.51 times. In the final step, the standard addition results confirmed the powerful ability of [C4mim][Cl]/Pt/SWCNTs/CPE to the monitoring of BHA in different water and food samples with acceptable recovery data.

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Fluorimetric determination of butylated hydroxy anisole in food products and packaging material

Cited by 8 publications

References 6 publications

Squirrel-cage photomultiplier base design for measurement of nanosecond fluorescence decays

Squirrel-cage photomultiplier base design for measurement of nanosecond fluorescence decays

ZnO/1-hexyl-3-methylimidazolium chloride paste electrode, highly sensitive lorazepam sensor

Monitoring of Butylated Hydroxyanisole in Food and Wastewater Samples Using Electroanalytical Two-Fold Amplified Sensor

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